|Year|Gross Domestic Product|US Dollar Exchange|Inflation Index (2000=100)|Per Capita Income (as % of USA)|
|---|---|---|---|---|
|1980|7,764|0.27 Kuwaiti Dinars|55|171.08|
|1985|6,450|0.29 Kuwaiti Dinars|68|71.58|
|1990|5,328|0.29 Kuwaiti Dinars|80|37.00|
|1995|8,114|0.29 Kuwaiti Dinars|92|62.14|
|2000|11,570|0.30 Kuwaiti Dinars|100|48.92|
|2005|21,783|0.29 Kuwaiti Dinars|108|64.35|

Question: which year has the most per capita income (as % of usa)?
Answer: 1980